BFCVTN, BFCVTN2

Floating-point convert from single-precision to BFloat16 format (vector)

This instruction reads each single-precision element in the SIMD&FP source vector, converts each value to BFloat16 format, and writes the results in the lower or upper half of the SIMD&FP destination vector. The result elements are half the width of the source elements.

The BFCVTN instruction writes the half-width results to the lower half of the destination vector and clears the upper half to zero. The BFCVTN2 instruction writes the results to the upper half of the destination vector without affecting the other bits in the register.

Vector single-precision to BFloat16
(FEAT_BF16)

Decode for this encoding

if !IsFeatureImplemented(FEAT_BF16) then EndOfDecode(Decode_UNDEF); constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer part = UInt(Q); constant integer elements = 64 DIV 16;